Description
Adjustable Vacuum Secondary Housing Complete will come assembled with a plain spring and the Holley 135-4 Diaphragm. This is a great housing to use when dialing in when your secondaries open. The gasket and clip for installation are sold separately. This will work on any vacuum secondary Holley, Brawler, or QFT carburetor. Some lower CFM Holley carbs, like the List 8007, require a shorter diaphragm.
